Acid wool dyestuffs of the anthraquinone series



Patented Mar.12,19 40 Acm WOOL DYESTUFFS OF THE .QUINONE SERIES ANTHRA-Werner Zerweck and Ernst Heinrich, Frankforton-the-Main-Fechenheim,Germany, assignors to General Aniline 8; Film Corporation, a cor- Iporation of Delaware No Drawing. Application November d, i937, Se-

rial No. 172,748. In Germany November 12, 1936 3 Claims. ('01. 260-372)Our present invention relates to "acid wool dyestuffs of theanthraquinone series more particularly to those of the general formula:

I CH3 SOz-NH-CH PSOBH IYTH wherein R stands for a radicle of the benzeneseries.

The new dyestuffs are obtainable by condensingamino-4-halogenoanthraquinone 2 sulfonic acid chlorides with the2-aminopropane-2 sulfonic acid and acting on the sulfamide thus obtainedwith an aromatic amine in the presence of an acidbinding agent. vOr onemay convert an 1 -amino -4-arylido-anthraquinone-2-sulfonic acid intothe sulfochlorideand condense the latter with the2-aminopropane-2-su1fonic acid.

The present new dyestufis dye the animal fibers from an acid bath bluishshades of a good fastness. a

In order to further illustrate our invention the following examples aregiven, the parts being by weight and all temperatures in degreesCentigrade.

Example To a solution of 54 parts ofl-amino-l-bromanthraquinone-2-sulfochloride in a mixture of 450 parts ofdioxane and 150 parts of alcohol, a solution of the sodium salt of54parts of 2- aminopropane-3-sulfonid acid in about 160 parts of wateris added and the mixture is stirred for some hours. The precipitatedsulfamide of the formula:

- 'ONH:

may be purified by redissolving it in water. It

crystallizes from water as reddish orange needles,

which are easily soluble in water.

lo parts thereof are dissolved in 1000 parts of Water and 12 parts ofaniline, 5 parts of sodium bicarbonate and 1 part of cuprous chlorideare added. The solution is heated for some hours at to The newdyestufi", which may be isolated as described in the foregoing ex- 1ample of the formula:

'0 NH, CH:

S0:IFT-CH/ OHr-SOsH dyes Wool from an acid bath pure and fast blu shadesof a good levelling power.

cm soia ONH wherein R stands for, a radicle of the benzene serieswhichdyestuffs dye animal fibers from an acid bath bluish shades of a goodfastness.

2. An acid wool dyestufi of the anthraquinone series of the formula:

which dyestuff dyes wool from an acid bath pure and fast greenish blueshades of a good levelling power.

which dyestufi dyes wool from an acid bath pure and fast blue shades ofa good levelling power.

3. An acid wool dyestufi of the anthraquinone series of the formula:

WERNER Z ERWECK. ERNST HEINRICH.

